Looks like there's been a regression bug which is delaying the implementation of the Australis theme. There's not a confirmed target yet. Possibly version 16. With the announcement of development ending for Mozilla Thunderbird, there's a major restructering going on at Mozilla. Developers are being moved into other departments. Some will end up developing Firefox quicker with many new features, others will be moved to develop Mozilla's new OS and others into developing heavily in the mobile department which could include both a mobile OS to compete with Android/iOS and develop Firefox for the mobile platform.

Right now, the focus is in developing a working metro app/tile for Windows 8 (rumored to be released in October) which should be in the next release of Firefox 14.Edited by djkilla - 7/9/12 at 8:00am